On Wed, Apr 26, 2006 at 06:29:51PM -0700, Globe Trotter wrote: > > --- Tim Fenn <fenn@xxxxxxxxxxxx> wrote: > > > On Wed, Apr 26, 2006 at 01:13:56PM -0700, Globe Trotter wrote: > > > > > > Has anyone used fftw on FC5? I upgraded two weeks ago, and now I get > > > FFT's all zeros. I am not sure if I have inadvertently introduced a > > > bug in my program somewhere, but I am mystified, where. > > > > > > So, I thought I would ask if anyone has had problems/no problems > > > with fftw on FC5. > > > > > > > I don't know if this is of use, but since I upgraded a library that > > uses fftw2, I've had to use -fno-strict-aliasing with gcc 4.1.0 (or > > turn down the level of optimization below 1) in order for fftw calls > > to work as I'd expect. I don't know if the same is true with fftw3, > > however. > > > > Thanks! I think you may be right. I switched the option to > FFTW_ESTIMATE from FFTW_MEASURE and it worked like a > charm. Actually, it appears that FFTW_MEASURE does not work even > with RHEL4. I have sent the FFTW developers a note asking them > whether that needs to be called any differently. > Interesting. Would you mind posting back to this thread if/when you hear back? It may be worth filing a bugzilla report with the patch, if they offer one up. > Btw, fftw actually uses fftw3 nowadays. > I did not know that. Learn somethin' every day. -Tim -- Morals? I eat communism and $h!t America, brother. --Seanbaby
